I'll try and keep it brief, but it's not easy.
I swap all pasta and bread for GF versions, and they are ok - I prefer sainsburys own twirls pasta and genius bread.
All plain meat, fish, fruit and vegetables are fine, and we have alot of just meat/fish potato and vegetable meals. Tinned tuna and salmon are also things I rely on quite alot for sandwiches.
Eggs are fine for both dairy and wheat free diets.
Goodies crisps in the tomato flavour are DF and WF if she likes little treats.
Errr, avoid post ready made sauces and soups etc, however Covent Garden tomato and basil is free from everything. Baked beans are fine, and their is a free from tinned spagetti too. All biscuits I buy from Sainsburys, and they aren't too bad, and choc buttons too. Mainly I make my own cakes/cookies though, and just buy a substitute flour - Doves farm.
Potato waffles I buy from Tescos. I make all my own chips, wedges, roasts etc just with extra virgin olive oil and a sprinkle of pepper.
I do struggle abit with breakfast, but their is some spelt porridge I've seen in sainsburys, but usually I have rice puffs, which taste abit odd, and smell vile, but fill the hole. Otherwise I make things like eggs on toast and pancakes with dairy free milk and doves farm flour.
Hope I haven't focused too much on junky food, but I know when I struggle with symptoms sometimes I just want a nibble not a meal, and for a long time I struggled just eating anything, so it was all a bonus.
I'll keep thinking. xx